We spent 14 1/2 days on Red without any accidents, and a few days ago I fashioned some training wheels for the Amber stage in the form of a flexible cutting board (from Amazon as recommended in this forum).

Astor pees & poops first thing in the morning, and then pees again before bedtime, so I made the switch mid-day so he only had to pee the first time he used it.

And we've now used it successfully for three days, with four pees & two poops, and no accidents. His confidence is still great & he doesn't dilly-dally much at all anymore (or scratch at the litter to pretend to go just for treats!).

And his positioning has really improved! In fact, his morning pee went 80% through the hole! I don't think he was really aiming for the hole--he tends to pee in the center, though--but it was really great to see him unaffected by the sound of his urine hitting the water below.

You can see photos of the adapted Amber attached--the only difference I've made was to seal around the inner edge of the center reservoir with duct tape, as I quickly learned that urine seeps under the LK between the cutting board & the tray (ick). So far, I've taken off the cutting board to clean separately twice a day, but it's not too bad.

I'm thinking of cutting the hole bigger tonight or tomorrow! Wish us luck

I used an Olfa utility knife. Well, technically, I used one of my replacement blades because the hardware store doesn't have replacement blades for my knife model. But I highly recommend using a real utility knife
I like the model I have because it has snap-off blades: http://www.amazon.com/5004-Rubber-In...9233355&sr=8-4